Considering to the geochemical behaviors and environmental changes of bottom sediments in streams, Gwangju metropolitan city, this study focuses to analyses on grain sizes, metal elements and organic carbons in sediment samples from Yeongsan and Hwangryong rivers,and Gwangju stream. In the sediments, contents of Cu, Zn, Pb, P and TOC were highly variable, in the case of Gwangju stream particularly. Yenogsan and Hwangryong rivers are influenced by grain sizes and surrounding geological settings and Gwangju stream is connected to organic matters related to life fouls and so forth, with respect to the geochemical behaviorof bottom sediments. Li, Zn, Pb and Cu were enriched in Yeongsan and Hwangryong rivers and Li, Cu, Zn, Pb and P enriched in Gwangju stream, respectively. In the heavy metal contamination of above drainages, the site mutually connected Seobang(GJ 4) with Donggye(GJ 7) streams shows the highest values, in peculiar. It is inferred that those contamination values are mainly related with urban foul waters in the city.